L1Notes - ( lens grows forward w/ age ) Vitreous POSTERIOR...

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1/24/08 The Eye and Sight: How does it work in the normal eye? UV 400-700nm IR VIBGYOR Light enters pupil Iris controls pupil size to control amount of light getting in Cornea-2/3’s Lens-1/3 of power of the eye Both are transparent Fovea: dark spot at the center of retina Sclera: outermost tough coat of eye Choroid: blood vessels (spongey) Retina: innermost part of eye (nerve tissues brain) (axons optic nerves) Human eye diameter Takes only 2 years to get to adult size (24mm) Human crystalline lens Yellows and stiffens w/ age Can’t change shape Need reading glasses Cornea ( aqueous ANTERIOR chamber
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Unformatted text preview: ( lens grows forward w/ age ) Vitreous POSTERIOR Chamber: jello-like age watery (liquefies) Macula / Fovea (pit): center of retina, highest density of photoreceptors Visual Acuity & Color Vision best at fovea! Two kinds of photoreceptors in the retina Rods-night-20/200 grayscale Cones-day-20/20 color 3 types: blue, green, red rods (most sensitive to light) > cones 15 blind spot: NO photoreceptors Eye Movements-pursuit follow; saccade jump Divergence vs Convergence (allows stereo/3D vision)...
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This note was uploaded on 09/24/2009 for the course OPTOM c10 taught by Professor Levi during the Spring '08 term at University of California, Berkeley.

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